پديدآور مقاله كنفرانس ها ِDaraby Bayaz bdaraby@maragheh.ac.ir Department of Mathemat.... ِDaraby Bayaz bdaraby@maragheh.ac.ir Department of Mathematics, University of Maragheh, Maragheh, Iran ◄ Vaezi Zahra z.vaezi@stu2.maragheh.ac.ir Department of Mathematics, University of Maragheh, Maragheh, Iran

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